Electronic voltage transformer online checking system

A voltage transformer, electronic technology, applied in the field of electronic voltage transformer online calibration system, can solve the problems of live operation danger, unfavorable on-site use, large equipment volume, etc., achieve simple and reliable insulation, ensure accuracy, and can strong mobility effect
CN104777445AActive Publication Date: 2015-07-15宜昌昌耀电力成套设备有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
宜昌昌耀电力成套设备有限公司
Publication Date
2015-07-15

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Abstract

The invention relates to an electronic voltage transformer online checking system which comprises a voltage sensing unit, a signal conversion unit, a signal transmission unit and a checking platform, wherein the voltage sensing unit is used for acquiring a primary voltage signal online; the output of the voltage sensing unit is used as a standard signal; after being processed by the signal conversion unit, the standard signal is transmitted to the checking platform by the signal transmission unit. The electronic voltage transformer online checking system disclosed by the invention uses a ring-shaped electric field sensing array as the voltage sensing unit and can acquire the primary voltage signal under the uninterruptible power condition. The voltage sensing unit does not need to be directly connected with a primary wire, but acquires the primary voltage signal in an electromagnetic induction manner, therefore, normal operation of a line is not influenced, and the problem of ferromagnetic resonance also does not exist.
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Description

technical field

[0001] The invention relates to an electronic voltage transformer online calibration system, which relates to the field of power system measurement. Background technique

[0002] The development of smart grid and the large number of smart substations put into operation have put forward higher and higher requirements for the corresponding measurement technology. Due to the shortcomings of ferromagnetic resonance, poor transient characteristics, large volume, and heavy weight, traditional transformers cannot meet the requirements of modern power systems, and because the output of traditional transformers is analog, the output of voltage transformers is generally 100V / 57.7V , while the current transformer output is 5A / 1A, these analog output forms cannot meet the development direction of measurement and protection digitization. Therefore, electronic transformers based on new sensing principles have been more and more used in smart substations. Electronic trans...

Claims

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